Hi, a friend directed me here.
The article is very well done and reasoned out, however, there is a male dynamic which maybe you are unaware of. Physical bonding is seen most in men who have one thing in common, military or contractor service. Never would I say all, but many men who have served in the military or contracted themselves to private counterparts fall outside this norm. Maybe this has something to do with escaping the phenomenon?
Also, I feel ignoring the biological reality of humans is an error.
From a purely psychological point of view, though, spot on.